[So-called doubling of the left atrioventricular opening].
D000368:Aged; D003937:Diagnosis, Differential; D006330:Heart Defects, Congenital; D006801:Humans; D008297:Male; D008943:Mitral Valve / Q000002:abnormalities*
Die sogenannte Verdoppelung des Ostium atrioventriculare sinistrum.